Dandandan commented on PR #23026:
URL: https://github.com/apache/datafusion/pull/23026#issuecomment-4847207065

   > FWIW I don't think "halo rows" is a standard database term -- it means 
"overlapping partitions with replicated boundary rows"
   
   I had to look up where the terminology comes from (as Claude _really_ likes 
the term) - it comes from HPC / parallel scientific computing literature (halo 
or ghost cells) where it is often called this way.
   
   But I agree overlap or boundary rows or something makes more sense.


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